Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 17

First-Order Line Spread Functions

---

Table 13.40: Spectral Resolution for CCD First- Order Modes

Slit	Spectral Resolution (FWHM in pixels)
	Point Source				Extended Source
	3200 Å	5500 Å	7000 Å	10000 Å
52X0.05	1.3	1.4	1.5	1.7	2
52X0.1	1.3	1.4	1.5	1.7	~2-3
52X0.2	1.3	1.5	1.6	2.0	~4
52X0.5	1.3	1.5	1.6	2.0	~10
52X2	1.3	1.5	1.6	2.0	~40

Figure 13.89: CCD First-Order L-Mode Line Spread Functions


 

Table 13.41: Spectral Resolution for MAMA First Order Modes

Slit	Spectral Resolution (FWHM in pixels)
	Point Source				Extended Source
	1200 Å	1500 Å	1700 Å	2400 Å
52X0.05	1.6	1.5	1.41	2.1	-2
			2.22
52X0.1	1.6	1.5	1.41	2.1	~4
			2.22
52X0.2	1.7	1.5	1.41	2.1	~8
			2.22
52X0.5	1.7	1.5	1.41	2.1	~20
			2.22
52X2	1.7	1.5	1.41	2.1	~80
			2.22

1FWHM with FUV-MAMA (G140L, G140M). 2FWHM with NUV-MAMA (G230L, G230M).

Figure 13.90: MAMA First-Order Line Spread Functions. Top G140L and G140M, bottom G230L and G230M